guess_ext_from_mimetype = {'video/3gpp2': '.3gp2', 'video/3gpp': '.3gp', 'image/apng': '.apng', 'image/x-jg': '.art',
                           'video/x-ms-asf': '.asf', 'image/avci': '.avci', 'image/avcs': '.avcs',
                           'video/x-msvideo': '.avi', 'image/avif': '.avif', 'image/avif-sequence': '.avifs',
                           'video/annodex': '.axv', 'image/bmp': '.bmp', 'image/x-cmx': '.cmx', 'image/cis-cod': '.cod',
                           'video/x-dv': '.dv', 'video/divx': '.divx', 'image/emf': '.emf', 'video/mp4': '.mp4',
                           'video/x-flv': '.flv', 'image/gif': '.gif', 'image/heic': '.heic',
                           'image/heic-sequence': '.heics', 'image/heif': '.heif', 'image/heif-sequence': '.heifs',
                           'image/x-icon': '.ico', 'image/ief': '.ief', 'video/x-ivf': '.IVF', 'image/pjpeg': '.jfif',
                           'image/jpeg': '.jpg', 'video/x-la-asf': '.lsf', 'video/mpeg': '.mpg',
                           'video/vnd.dlna.mpeg-tts': '.m2t', 'video/x-m4v': '.m4v', 'image/x-macpaint': '.mac',
                           'video/x-matroska-3d': '.mk3d', 'video/x-matroska': '.mkv', 'video/quicktime': '.mov',
                           'video/x-sgi-movie': '.movie', 'video/ogg': '.ogv', 'image/x-portable-bitmap': '.pbm',
                           'image/pict': '.pic', 'image/x-portable-graymap': '.pgm', 'image/png': '.png',
                           'image/x-portable-anymap': '.pnm', 'image/x-portable-pixmap': '.ppm',
                           'image/x-quicktime': '.qti', 'image/x-cmu-raster': '.ras', 'image/vnd.rn-realflash': '.rf',
                           'image/x-rgb': '.rgb', 'image/svg+xml': '.svg', 'image/tiff': '.tiff',
                           'image/vnd.wap.wbmp': '.wbmp', 'image/vnd.ms-photo': '.wdp', 'video/webm': '.webm',
                           'image/webp': '.webp', 'video/x-ms-wm': '.wm', 'video/x-ms-wmp': '.wmp',
                           'video/x-ms-wmv': '.wmv', 'video/x-ms-wmx': '.wmx', 'video/x-ms-wvx': '.wvx',
                           'image/x-xbitmap': '.xbm', 'image/x-xpixmap': '.xpm', 'image/x-xwindowdump': '.xwd',
                           'image/x-png': '.png'}
